cd C:\Program Files\Microsoft SDKs\Windows Phone\v7.0\Emulation\Images
c:
del WM70C1.en-US.bin
copy old.bin bear.bin
rename bear.bin WM70C1.en-US.bin
cd C:\$Recycle.Bin\S-1-5-21-1239131955-1639306708-3529809599-1000
del WM70C1.en-US.bin